Excavator



A. M. HOOD June 29 1926.

EXCAVATOR Filed Jan. 8. 1925 Patented June 29, 192%..

ARTHUR noon, on INDIANAPOLIS, INDIANA.

nxcAvAron.

App1ication filed January The object of my invention is to produce anexcavator oil the dipper type in which the digging swing and forwardcrowd is accomplished by a single cable and the re- 5 turn lift andresistance to forward crowd is accomplished by an independentcoordinated means. I

The accompanying drawing illustrates my invention, said drawing being aside elevation, largely diagranmia-tic in character, of an embodiment ofmy invention.

In the drawing indicates a suitable supporting structure, .as forinstance, a truck which may be motorized, the truck :being provided witha .turn table 11, an anchorage mast 12 and a motor 13 equipped with twowinding drums 14 and 15, all being of common construction and the axisof the turn table 11 being vertically beneath the upperend of theanchorage mast 12. The above described construction may be of anyordinary well known character.

Supported upon turn table 11 is an upwardly and outwardly extended boom16 supported at a desired inclination from the upper end-of mast 12 by astretcher bar 17 and suspension cables 18. Mounted at the outer end ofboom 16 is a sheave shaft 20 upon which are journaled two sheaves 21 and22, which, for convenience of illustration, are shown in the drawing asof slightly different diameter, although in "actual practice they aremost conveniently 0t the same diameter.

Boom 16 is conveniently formed of two parallel laterally spaced channelsso that the sheaves 21 and 22 may lie between the channels as indicated.

Journaled upon shaft 20 is a swinging yoke 23 which formsa guide for adipper handle 2d which is conveniently made of two parallel spacedchannels, one lying upon each side of the sheaves 21 and 22 and lyingbetween the channels of boom 16, the arrangement being such that thedipper handle 2 1 is freely slidable in yoke 23 and isswingable aboutshaft 20 as an axis. The outer end of the dipper handle 24 carries adipper 25 of any well known form and the details of which form no partof my present invention.

The upward retracting movement of the dipper handle is accomplished by apull back cable 26 in the present instance anchored to the outer end ofthe dipper han- .8, 1925. Serial No. 1,137.

dle. Of course it will be understood that cable may be associated withthe dipper handle 24 in any desired manner so that a pull on the cablewill serve to shift the dipper handle longitudinally inwardly. Cable 26passes over a sheave 2"! journaled on boom 16, over a sheave 28jourualed at the lower end of the boom 16, thence down through table 11at its axis and around sheave 29 to the winding drum 1%.

For the purpose of swinging the dipper 25 upwardly and also crowding thedipper handle outwardly I provide a cable 30, which is attached at itsouter end to the upper inner end of the .dipper handle, passes thencerearwa-rd'ly around a sheave 31 at the lower end of the boom, thenceforwardly around the sheave 22, thence up to and around a sheave 32 onthe inner end of the dipper handle, thence down and around sheave 21,thence back to a sheave 33, co-axial with sheaves 28 and 31, thence downthrough table 11 and around a sheave 34L .CO-fLXlfll with sheave 29 andthence to the winding drum 15.

It will, of course, be understood thatthe winding drums 1 1 and 15 willbe provided with suitable controlling members by which they maybeindependently orsimultaneously controlled in their movements in eitherdi- .rection.

In operation a pull .upon cable 30'by drum 15 will exert an outwardthrust upon the dipper handle through the medium of the bight of thecable passing around sheave 32 and will also exert a swing-in g forceupon the dipper handle through the medium of the outer end of the cableand its attachment through the upper inner end of the dipper handle. Acombined swing and outward thrust may be accomplished by a gradualrelease of the cable 26 and outward thrusting movement may be eliminatedby hanging on to cable 26 by braking drum 1st.

I'elaim as my invention:

1. In an excavator, a boom, a dipper handle swingably and slidably momted on said boom, a thrust-in and lifting cable attached to the innerend of said handle and passed from thence around a sheave at the innerend of the boom, thence around a sheave further out on the boom, thencearound asheave at the inner end of the handle, thence around a secondsheave on the boom, and thence to a winding drum,

the boom, and thence to a winding drum,

and a second cable supported by the boom and engaging the dipper handleto resist outward crowd and to retract the handle longitudinally.

3. In an excavator, a handled dipper, a support on which said handle isswingably and slidably mounted, a main hoisting and crowding cableassociated with the support and with the inner end of the handle to bothswing and crowd it longitudinally in one direction, and means forresisting said crowding movement, said means comprising 7 a second cableattached to the outer end of the handle.

. 4:. In an excavator, a handled dipper, a support on which said handleis swingably and slidably mounted, a main hoisting and crowding cableassociated with the support and with the inner end of the handle to bothswing and crowd it longitudinally in one direction, and means forresisting said crowding movement.

5. In an excavator, a handled dipper, a support on which said handle isswingably andslidably mounted, a main swinging and crowding cableassociated with the support and having a bight in end thrust engagementwith one end of the handle for crowding it in one direction and anotherportion in swinging engagement with the same end of the handle, andmeans for resisting said crowding action, said means including a cableattached to the other end of the handle.

6. In an excavator, a handled dipper, a support on which said handle isswingably and slidably mounted, a main swinging and crowding cableassociated with the support and having a bight in end thrust engagementwith one end of the handle for crowding it in one direction and anotherportion in swinging engagement with the same end of the handle, andmeans for resisting said crowding action.

7. In an excavator, a handled dipper, a support on which said handle isswingably and slidably mounted, a main swinging and crowding cableassociated with the support and having a bight in end thrust engagementwith the inner end of the handle for crowding it outwardly and anotherportion in swinging engagement with the inner end of the handle andmeans for resisting said outward crowd, said means including a cableattached to the outer end of the handle.

8. In an excavator, a handled dipper, a. support on which said handle isswingably and slidably mounted, a main swinging and crowding cableassociated with the support and having a bight in end thrust engagementwith the inner end of the handle.

9. In an excavator, a handled dipper, a support on which said dipper isswingably and slidably mounted, a main swinging and crowding cableassociated with said support and having one portion in crowdingassociation with one end of the handle and another portion in swingingengagement with the same end of the handle, and means for resisting saidcrowding, said means including a cable attached to the opposite end ofthe handle.

10. In an excavator, a handled dipper, a support on which said dipper isswingably and slidably mounted, a main swinging and crowding cableassociated with said support and having one portion in crowdingassociation with one end of the'handle and another portion in swingingengagement with the same end of the handle, and means for resisting saidcrowding.

11. In an excavator, a handled dipper, a support on which said dipper isswingably and slidably mounted, a main swinging and crowding cableassociated with said support and having one portion in crowdingassociation with the inner end of the handle and another portion inswinging engagement with the inner portion of the handle, and means forresisting said crowding, said means including a cable attached to theouter end of the handle.

12. In an excavator, a handled dipper, a support on which said dipper isswingably and slidably mounted, a main swinging and crowding cableassociated with said support and having one portion in crowdingassociation with the inner end of the handle and another portion inswinging engagement with the inner portion of the handle, and means forresisting said crowding.

In witness'whereof, I have hereunto set my hand at Indianapolis,Indiana, this 6th dayof January, A. D. one thousand nine hundred andtwenty five.

ARTHUR M. HOOD.

